# Redisson - Redis Java client<br/>with features of In-Memory Data Grid

[Quick start](https://github.com/redisson/redisson#quick-start) | [Documentation](https://github.com/redisson/redisson/wiki/Table-of-Content) | [Javadocs](http://www.javadoc.io/doc/org.redisson/redisson/3.11.5) | [Changelog](https://github.com/redisson/redisson/blob/master/CHANGELOG.md) | [Code examples](https://github.com/redisson/redisson-examples) | [FAQs](https://github.com/redisson/redisson/wiki/16.-FAQ) | [Report an issue](https://github.com/redisson/redisson/issues/new)

Based on high-performance async and lock-free Java Redis client and [Netty](http://netty.io) framework.  
JDK compatibility:  1.8 - 13, Android  

## Features

* Replicated Redis servers mode (also supports [AWS ElastiCache](http://docs.aws.amazon.com/AmazonElastiCache/latest/UserGuide/Replication.html) and [Azure Redis Cache](https://azure.microsoft.com/en-us/services/cache/)):
    1. automatic master server change discovery
* Clustered Redis servers mode (also supports [AWS ElastiCache Cluster](http://docs.aws.amazon.com/AmazonElastiCache/latest/UserGuide/Clusters.html) and [Azure Redis Cache](https://azure.microsoft.com/en-us/services/cache/)):
    1. automatic master and slave servers discovery
    2. automatic status and topology update
    3. automatic slots change discovery
* Sentinel Redis servers mode: 
    1. automatic master, slave and sentinel servers discovery
    2. automatic status and topology update
* Master with Slave Redis servers mode  
* Single Redis server mode (also supports [Azure Redis Cache](https://azure.microsoft.com/en-us/services/cache/) and [Google Cloud Memorystore for Redis](https://cloud.google.com/memorystore/docs/redis/)) 
* Thread-safe implementation  
* [Reactive Streams](https://github.com/redisson/redisson/wiki/3.-operations-execution#32-reactive-way) API  
* [RxJava2](https://github.com/redisson/redisson/wiki/3.-operations-execution#32-reactive-way) API  
* [Asynchronous](https://github.com/redisson/redisson/wiki/3.-operations-execution#31-async-way) API  
* Asynchronous connection pool  
* Lua scripting  
* [Distributed Java objects](https://github.com/redisson/redisson/wiki/6.-Distributed-objects)  
    Object holder, Binary stream holder, Geospatial holder, BitSet, AtomicLong, AtomicDouble, PublishSubscribe,
    Bloom filter, HyperLogLog
* [Distributed Java collections](https://github.com/redisson/redisson/wiki/7.-Distributed-collections)  
    Map, Multimap, Set, List, SortedSet, ScoredSortedSet, LexSortedSet, Queue, Deque, Blocking Queue, Bounded Blocking Queue, Blocking Deque, Delayed Queue, Priority Queue, Priority Deque
* [Distributed Java locks and synchronizers](https://github.com/redisson/redisson/wiki/8.-Distributed-locks-and-synchronizers)  
    Lock, FairLock, MultiLock, RedLock, ReadWriteLock, Semaphore, PermitExpirableSemaphore, CountDownLatch
* [Distributed services](https://github.com/redisson/redisson/wiki/9.-distributed-services)  
    Remote service, Live Object service, Executor service, Scheduler service, MapReduce service
* [Spring Framework](https://github.com/redisson/redisson/wiki/14.-Integration%20with%20frameworks#141-spring-framework)
* [Spring Cache](https://github.com/redisson/redisson/wiki/14.-Integration%20with%20frameworks/#142-spring-cache) implementation
* [Spring Transaction API](https://github.com/redisson/redisson/wiki/14.-Integration-with-frameworks/#147-spring-transaction-manager) implementation
* [Spring Data Redis](https://github.com/redisson/redisson/wiki/14.-Integration-with-frameworks/#148-spring-data-redis) integration
* [Spring Boot Starter](https://github.com/redisson/redisson/wiki/14.-Integration-with-frameworks/#149-spring-boot-starter) implementation
* [Hibernate Cache](https://github.com/redisson/redisson/wiki/14.-Integration%20with%20frameworks/#143-hibernate-cache) implementation
* [Transactions API](https://github.com/redisson/redisson/wiki/10.-Additional-features#104-transactions)
* [XA Transaction API](https://github.com/redisson/redisson/wiki/10.-additional-features/#105-xa-transactions) implementation
* [JCache API (JSR-107)](https://github.com/redisson/redisson/wiki/14.-Integration%20with%20frameworks/#144-jcache-api-jsr-107-implementation) implementation
* [Tomcat Session Manager](https://github.com/redisson/redisson/wiki/14.-Integration%20with%20frameworks#145-tomcat-redis-session-manager) implementation
* [Spring Session](https://github.com/redisson/redisson/wiki/14.-Integration%20with%20frameworks/#146-spring-session) implementation
* [Redis pipelining](https://github.com/redisson/redisson/wiki/10.-additional-features#102-execution-batches-of-commands) (command batches)
* Supports Android platform  
* Supports auto-reconnection  
* Supports failed to send command auto-retry  
* Supports OSGi  
* Supports SSL  
* Supports many popular codecs ([Jackson JSON](https://github.com/FasterXML/jackson), [Avro](http://avro.apache.org/), [Smile](http://wiki.fasterxml.com/SmileFormatSpec), [CBOR](http://cbor.io/), [MsgPack](http://msgpack.org/), [Kryo](https://github.com/EsotericSoftware/kryo), [Amazon Ion](https://amzn.github.io/ion-docs/), [FST](https://github.com/RuedigerMoeller/fast-serialization), [LZ4](https://github.com/jpountz/lz4-java), [Snappy](https://github.com/xerial/snappy-java) and JDK Serialization)
* With over 2000 unit tests  
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## Success stories

## [Moving from Hazelcast to Redis  /  Datorama](https://engineering.datorama.com/moving-from-hazelcast-to-redis-b90a0769d1cb)  
## [Distributed Locking with Redis (Migration from Hazelcast)  /  ContaAzul](https://carlosbecker.com/posts/distributed-locks-redis/)  
## [Migrating from Coherence to Redis](https://www.youtube.com/watch?v=JF5R2ucKTEg)  


## Quick start

#### Maven 
    <dependency>
       <groupId>org.redisson</groupId>
       <artifactId>redisson</artifactId>
       <version>3.11.6</version>
    </dependency>  


#### Gradle
    compile 'org.redisson:redisson:3.11.6'  

#### Java

```java
// 1. Create config object
Config config = new Config();
config.useClusterServers()
       // use "rediss://" for SSL connection
      .addNodeAddress("redis://127.0.0.1:7181");

// or read config from file
config = Config.fromYAML(new File("config-file.yaml")); 
```

```java
// 2. Create Redisson instance

// Sync and Async API
RedissonClient redisson = Redisson.create(config);

// Reactive API
RedissonReactiveClient redissonReactive = Redisson.createReactive(config);

// RxJava2 API
RedissonRxClient redissonRx = Redisson.createRx(config);
```

```java
// 3. Get Redis based Map
RMap<MyKey, MyValue> map = redisson.getMap("myMap");

RMapReactive<MyKey, MyValue> mapReactive = redissonReactive.getMap("myMap");

RMapRx<MyKey, MyValue> mapRx = redissonRx.getMap("myMap");
```

```java
// 4. Get Redis based Lock
RLock lock = redisson.getLock("myLock");

RLockReactive lockReactive = redissonReactive.getLock("myLock");

RLockRx lockRx = redissonRx.getLock("myLock");
```

```java
// 4. Get Redis based ExecutorService
RExecutorService executor = redisson.getExecutorService("myExecutorService");

// over 30 different Redis based objects and services ...

```

Consider __[Redisson PRO](https://redisson.pro)__ version for advanced features and support by SLA.

## Downloads
   
[Redisson 3.11.6](https://repository.sonatype.org/service/local/artifact/maven/redirect?r=central-proxy&g=org.redisson&a=redisson&v=3.11.6&e=jar),
[Redisson node 3.11.6](https://repository.sonatype.org/service/local/artifact/maven/redirect?r=central-proxy&g=org.redisson&a=redisson-all&v=3.11.6&e=jar)  

## FAQs

[Q: I saw a RedisTimeOutException, What does it mean? What shall I do? Can Redisson Team fix it?](https://github.com/redisson/redisson/wiki/16.-FAQ#q-i-saw-a-redistimeoutexception-what-does-it-mean-what-shall-i-do-can-redisson-team-fix-it)

[Q: I saw a com.fasterxml.jackson.databind.JsonMappingException during deserialization process, can you fix it?](https://github.com/redisson/redisson/wiki/16.-FAQ#q-i-saw-a-comfasterxmljacksondatabindjsonmappingexception-during-deserialization-process-can-you-fix-it)

[Q: There were too many quotes appeared in the redis-cli console output, how do I fix it?](https://github.com/redisson/redisson/wiki/16.-FAQ#q-there-were-too-many-quotes-appeared-in-the-redis-cli-console-output-how-do-i-fix-it)

[Q: When do I need to shut down a Redisson instance, at the end of each request or the end of the life of a thread?](https://github.com/redisson/redisson/wiki/16.-FAQ#q-when-do-i-need-to-shut-down-a-redisson-instance-at-the-end-of-each-request-or-the-end-of-the-life-of-a-thread)

[Q: In MapCache/SetCache/SpringCache/JCache, I have set an expiry time to an entry, why is it still in Redis when it should be disappeared?](https://github.com/redisson/redisson/wiki/16.-FAQ#q-in-mapcachesetcachespringcachejcache-i-have-set-an-expiry-time-to-an-entry-why-is-it-still-in-redis-when-it-should-be-disappeared)

[Q: How can I perform Pipelining/Transaction through Redisson?](https://github.com/redisson/redisson/wiki/16.-FAQ#q-how-can-i-perform-pipeliningtransaction-through-redisson)

[Q: Is Redisson thread safe? Can I share an instance of it between different threads?](https://github.com/redisson/redisson/wiki/16.-FAQ#q-is-redisson-thread-safe-can-i-share-an-instance-of-it-between-different-threads)

[Q: Can I use different encoder/decoders for different tasks?](https://github.com/redisson/redisson/wiki/16.-FAQ#q-can-i-use-different-encoderdecoders-for-different-tasks)